Touhou Gairai Ihen (Tomes of External Origins) ~ Strange Creators of Outer World (東方外來韋編 Strange Creators of Outer World) is an official Touhou Project magazine which began publication on September 30, 2015. It is published by Kadokawa under its Dengeki Moeoh imprint with the full supervision and support of ZUN.

Strange Creators of Outer World was first announced via Twitter by synno_takana, a fan who spotted press materials at Comiket 88.[1][2] An official website was soon revealed. A preview of the first issue was released on September 24.[3]